# 这是一个注释

"""
这是一段注释
"""

# print('输出的内容')
#
# # 下划线
# user_name = '张三'
#
# # 小驼峰
# userName = '张三'

# age = 18
# print(f'今年张三的年龄是{age}岁')
# print('~~~一年过去了')
# print(f'今年张三的年龄是{age+1}岁')

# # 整型
# x = 10
# print(type(x))
#
# # 浮点型
# y = 0.1
# print(type(y))

# import math
#
# # 输入圆的半径
# radius = 3
#
# # 面积
# area = math.pi * radius ** 2
# print(f'圆的面积是{area}')
#
# # 周长
# perimeter = 2 * math.pi * radius
# print(f'圆的周长是{perimeter}')


# # and运算
# print(True and True)
# print(True and False)
#
# # or运算
# print(True or True)
# print(True or False)
#
# # not运算
# print(not True)
# print(not False)

# # 字符串单引号
# name = '张三'
# # 字符串双引号
# name = "张三"
# # 字符串三引号
# name = """张三"""
#
# # 单引号字符串插入单引号
# single_string = '你好：\'在吗？\''
# print(single_string)
#
# # 双引号字符串插入双引号
# double_string = "你好：\"在吗？\""
# print(double_string)
#
# # 换行和制表
# other_string = "张张：\n\t我很想念你"
# print(other_string)
#


# name = '张三'
# age = 18
# print("他的名字是%s，年纪是%d"%(name, age))
#
# name1 = '张三'
# age1 = 18
# print("他的名字是{},年纪是{}".format(name1, age1))
#
# name2 = '张三'
# age2 = 18
# print(f"他的名字是{name2}，年纪是{age2}")
#
# s = 'hello world'
# print(s[0])   # 输出 'H'
# print(s[-1])  # 输出 'd'
#
# s = "Hello,World!"
# # 顾头不顾尾
# print(s[6:11])  # 输出 'World'
#
# # 缺省取到尾
#
# print(s[6:])  # 输出 'World!'
#
# # 缺省取到头
# print(s[:6])  # 输出 'Hello,'
#
# # 默认从左向右
# print(s[6:11:1])  # 输出 'World!'
#
# # 隔1取
# print(s[6:11:2]) # 输出 'Wld'
#
# # 从右向左
# print(s[11:5:-1])  # 输出 '!dlroW'
# # 隔1取
# print(s[6:11:2]) # 输出 'Wld'
#
# # 从右向左
# print(s[11:5:-1])  # 输出 '!dlroW'
#
# name = '张三'
# sex = '男'
# print(name + sex) # 输出 '张三男'
#
# s = "Hello,World!"
# print(len(s)) # 输出 12
#
# s = "Hello,World!"
# print('lo' in s) # 输出 True

a = int(input("请输入："))
print(a)
print(type(a))